نتایج جستجو برای: anomeric based oxidation
تعداد نتایج: 3036890 فیلتر نتایج به سال:
For the first time in natural O-glycosides, a large amount of non-exo-anomeric conformation is experimentally detected, in solution.
This paper describes the functional characterization of the xyloside transporter, XylP, of Lactobacillus pentosus with the aid of a spectroscopy-based assay system. In order to monitor the transport reaction, the natural xyloside isoprimeverose, a building block of hemicellulose, and the analogue methyl-isoprimeverose were chemically synthesized by a new and efficient procedure. The XylP protei...
In this theory study the dominance of non-classical 1,3-diaxial CHax⋯OC hydrogen bonds (NCHBs) dictating anomeric effects in fluorinated methoxycyclohexanes and 2-methoxytetrahydropyrans is demonstrated, a phenomenon which most often described as consequence hyperconjugation.
Introduction: In base excision repair (BER), " small " oxidative DNA base damage is repaired in a series of steps initiated with a damage specific glycosylase that locates and removes the damaged base leaving a toxic abasic site. A damage general endonuclease (Endo IV or APE1) then binds to the abasic site, introduces a ~67° kink in the DNA and nicks the phosphodiester backbone. Subsequently, D...
This study introduces new methods of screening for and tuning chiral space and in so doing identifies a promising set of chiral ligands for asymmetric synthesis. The carbafructopyranosyl-1,2-diamine(s) and salens constructed therefrom are particularly compelling. It is shown that by removing the native anomeric effect in this ligand family, one can tune chiral ligand shape and improve chiral bi...
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